John charles coltrin



N0. 6|0,702. Patented Sept. I3, I898i.

J. C. COLTHIN.

inl.

inventan lfm, wim/p,

No. 6|o,7o2. 4 Pateted sept. I3, |898 gl.v n. coLTmN.

LOCK.

` Y V (App tion filed Fe. 4 (No Model.) 2 Sheets-Sheet 2.

ir .gl 7

WDG/wko L llla @C50/friki,

JOHN CHARLES COLTRIN, OF DENVER, COLORADO, ASSIGNOR OF ONE-HALF TO ARCHIE ALEXANDER, OF SAME PLACE.

LOCK.

SPECIFICATION forming part of Letters Patent No. 610,702, dated September 13, 1898.

Application filed February 21, 1898. Serial No. 671,111. (No model.)

To @ZZ whom it may concern.'

Be it known that LJOHN CHARLES CoLTRIN, a citizen of the United States, residing at Denver, in the county of Arapahoe and State of Colorado, have invented a new and useful Lock,of which the following is a specification.

My invention relates to locks,and more particularly to that class of locks known as combined locks and latches.

The object of my invention is to provide an improved lock in which springs are entirely dispensed with, weights being substituted therefor.

A further object of myinvention is to furnish an improved lock and latch in which the bolt cannot be withdrawn without operating the latch.

A further object 0f my invention is to furnish an improved combination lock and latch in which springs are dispensed with and weights substituted therefor.

With these objects in view my invention .consists in the improved construction, ar-

rangement, and combination of parts hereinafter fully described, and afterward specifically pointed out in the appended claims.

In order to enable others skilled in the art to which my invention most nearly appertains to make and use the same, I will now proceed to describe its construction and operation, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a viewof the lock with the exterior` plate removed, the latchand bolt being shot or in their looked positions. Fig. 2 is a 'similar view .with the latch and bolt withdrawn. Fig. A3 is a similar view with the latch shot and the bolt withdrawn. Fig. 4 is a vertical section on the line 4 4of Fig. 2, looking in the direction .indicated by the arrow. Fig. 5 is a detail perspective view of the latch and its operating-weight mechanism removedfromthe casing. Fig. 6 is a detail fragmentary sectional view on the line 6 6 of Fig. 7. Fig. 7 is a fragmentary detail sec` tional view on the line 7 7 of Fig. 3. Fig. 8 is an end view of the key.

Like numerals of reference mark the same parts wherever they occur in the diderent figures of the drawings.

Referring to the drawings by numerals, lO indicates one endof the casing of a lock, of .which 1l isthe back plate, 12 the front plate, 13 the other end, 14 the top, and 15 the 55 bottom. i

16 indicates the latch-bolt, which is swiveled in a casting 17, which in turn is provided with two parallel projecting arms 18 and 19, the

rst of which isarranged to slide between a 6 o rib 20, projectinginward from the top 14 and the rear plate, While the second slides upon a rib 21, projecting inward from the rear plate 1l. A link 22 is pivotally secured to the arm 23 of a hub 24, which is swiveled in openings 65 in the front and back plates in the usual manner and is provided with a central rectangular bore 25 to receive the square bar which connects the knobs. The opening in the front and back plates, the square bar, and the 7o knobs'are ofthe usual 'construction and are not illustrated.

An angular baror link 26 is pivotally connected at oneend to the casting`17 and at the other end to the upright arm of` an elbiow-lever 27, which is provided on its horizontal arm with a weight 2S. y

29 is the lock-bolt which is arranged to slide upon a double block or casting 30, formed on the bottom 15 of the casing. This bolt is pro- 8o vided with shoulders'31`32, and its inner portion is bifurcated, a tumbler 33 being pivot ally attached between its forks by means of a pin 34.' The tumbler 33 is weighted, as at 35,

and is provided'witha shoulder 36 to engage 85 a pin 37, projecting inward beyond the bolt, turned upward, as at 39, and beveled off on both sides, as at 40. A rib 41 projects from the upper side of the bolt. The front and rearplates are each provided with keyholes 9o 42 of the usual shape, except that a narrow slot-like extension 43 is provided at their upperends.`

44 is a bifurcated lugformedupon. the, in-

side of the end 13 of the lock-casing, to which is 95 47 on the lock-bolt when it is shot or in its roo locked position.

The block 48, cast upon the rear plate of the lock-casing, serves as a stop to limit the movement of the upright arm 47 of the Weighted elbow-lever which is pivotally secured upon the pin 49, which passes through two inward-projecting knobs 50 and 51 on the front and rear plates, respectively, of the lockcasing.

In Fig. 8 I have shown an end View of the key which is provided with a stem 52 and a ward 53, as is usual, but is also provided with a thin longitudinal flange 54 on top of the key to fit in the slotted extension 43 of the keyhole.

The construction of myimproved combination lock and latch will be readily understood from the foregoing description.

To operate the latch-bolt 16, it is only necessary to turn the knobs in the usual manner, which will rotate the hub 24 and carry around its arm 23, the link 22 acting as apitman, the arms 18 and 19 guiding the casting 17 in its sliding movement and the latch-bolt 16 being carried back with the casting or block 17.

This rearward movement of the block 17 carries with it the link 26, which, operating upon the upright arm 27 of the weighted lever, will raise the weight 28. As soon as the knobs are released the weight will drop and will reverse the motion of all the parts and thus automatically shoot the latch-bolt 16 into its locked position. When the latch-bolt is in its locked position, and consequently the weight 28 in its lower position, the lower corner of said weight will rest behind the rib 41 of the lock-bolt 29, so that the lock-bolt cannot be Withdrawn from its shot or locked position without operating the knob to raise the weight 28 from engagement with the rib 41. The lock-bolt being in its unlocked position, as shown in Fig. 3, the weighted end 35 of the pivoted dog 45 will be in its normal lower position and will rest against the stop 55, formed on the inside of the bottom 15 of the lockcasing, so that it must be raised therefrom before the bolt can be shot or thrown into its locked position. To perform this operation the key is passed into the keyhole, which by the contact of the bottom of the ward 53 thereof with the beveled portion 40 of the weighted tumbler will depress the rear end of the tumbler and raise the front end, thus removing the weighted end 35 of the tumbler from contact with the stop 54. The turning of the key so as to throw the ward thereof to the right will cause it to press against the rear end of the weighted tumbler and push the holt into its locked position, (indicated in Fig. 1,) the latter portion of the movement of the bolt being caused by giving the key a little more than a complete revolution, the ward acting upon the rear end 39 of the weighted tumbler during the latter part of the movement of the key and completing the outward movement of the bolt. "When the bolt reaches its outward position, the projecting end 46 of the dog 45 will drop behind the shoulder 47 and the weight 28 will drop behind the shoulder 32, thus firmly holding 4the bolt in its locked position, the stop 36 of the weighted tumbler engaging also behind the pin 37. To unlock or withdraw the lock-bolt it is, as before stated, necessary to lirst raise the weight 28 out of contact with the rib 41 by turning the knob slightly. The key is now moved in a reverse direction until the ward rests upon the inner upper edge of the end 39 of the weighted tumbler 35. This will depress the rear end of the tumbler and disengage the stop 36 from the pin 37. The further movement of the key bearing upon the inner side of the end 39 of the tumbler will tend to withdraw the bolt from its locked position, while at the same instant the upper rib 54 of the key will force upward against the under side of the dog 45, disengaging its end 46 from the shoulder 47 of the lock-bolt. All the stops being disengaged, the further movement of the key to a position to be withdrawn from the lock will carry the weighted tumbler and the lock-bolt to their rear or withdrawn positions.

From the foregoing description it will be readily apparent that I have produced a perfect -working combination lock and latch which carries out all the objects of my invention. The weight 28 answers the purpose of a spring usually used to normally keep the latch-bolt 16 in its shot or locked position, all springs being dispensed with. The tumbler 33 being weighted, all necessity for springs to operate it is avoided. The weight 28 in its normal position resting behind the rib 4l of the lock-bolt renders it necessary to turn the knob before the lock-bolt can be withdrawn even though the operator has a properlyshaped key in his possession.

The illustrations in this application represent the lock as in the form known as rimlocks 5 butit maybe applied to mortise-locks or any other class of locks. The same lock may also be used for either right or left hand IOO IIO

doors, it being only necessary to remove the latch-bolt and its operating mechanism from the case, reverse the position of the latchbolt by turning it on its swiveled end, and replace it in the case.

While I have illustrated and described the best means now known to me for carrying out my invention, I do not wish to be understood as restricting myself to the exact details of construction shown and described, but hold that any slight changes or variations such as might suggest themselves to the ordinary mechanic would properly fall within the limit and scope of my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is*

1. In a lock, the combination with the casing, of guideways formed thereon, a casting or block having arms projecting into the guideways, a latch-bolt swiveled in said block, a knob-receiving hub with a projecting arm, a ring connecting the said arm with the sliding block, an elbow-lever pivoted to the casing below the guides having its horizontal arm Weighted, and an angular link conneeti ng the upper end of its vertical arm with the sliding block, substantially as described.

2. The combination in a look, of a look-bolt having its rear end forked, and a tumbler pivotally secured between its forks, provided at its forward end with a weight and near its rear end with a stop to engage a stationary pin in the oase, substantially as deseribed.

3. The combination in a look, of the lookbolt forked at its rear end, a stationary pin in the ease, a weighted tumbler pivoted between the forks of the 1oek-bolt and carrying a stop to engage the stationary pin, and a pivoted dog above the keyhole and having a projecting end adapted to engage a shoulder in the loek-bolt, substantially as described.

4. In a look adapted for use with a key having the usual wards and a longitudinal flange along the upper side of its spindle, the oombination with the lock-bolt and a stationary pin in the easing, of a tumbler pivoted to the look-bolt weighted at its forward end and. provided near :its rear end with a stop to engage the pin, a lug secured in the ease, and a pivoted dog having projecting ends to engage a shoulder on the upper end of the look-bolt near its rear end, said pivoted dog being arranged to be raised out of Contact with the shoulder by the upper flange on the key while the wards of the key are operating upon the weighted tumbler, substantially as described.

JOHN CHARLES COLTRIN.

Witnesses:

IsooL N. COLTRIN, y Jol-IN H. BEUELHAIMER. 

